Small helpers, big impact: digitization makes soil renovation easier on gas works

digitalization soil renovation

Small helpers, big impact: digitization makes soil renovation easier on gas works

Small helpers, big impact: digitization makes soil renovation easier on gas works

The images that Friedrich Leifheit generates from gigabytes of data on his tablet almost look like surreal works of art. However, this is not about art, but about a digital terrain model. You can see the area of ​​the former gasworks in Arnstadt, which only consists of heaps and ruins of buildings. All other external traces of more than 70 years of industrial history have already disappeared, only environmentally hazardous substances such as tar, heavy metals, phenols or hydrogen sulfide compounds still lie dormant deep in the ground. The contract from the Bauer Umwelt division of BAUER Resources GmbH in cooperation with BAUER Spezialtiefbau GmbH: soil remediation including construction pit construction and groundwater purification.

In January 2021, work began on digitally surveying the 12,000 m2 area using a drone and a rover pole. During the survey flight, the drone took hundreds of high-resolution photos on which even objects a few millimeters in size can be recognized. The rover rod also enabled centimeter-accurate measurements and thus the quick determination of the bulk cubatures, the volumes of the excavations and changes in the terrain. Following the data acquisition, the collected images could be used to generate 3D data, which were then transferred to a digital terrain model. The result: true-to-scale and photo-realistic images of the entire construction site with all the details. "The more precise and detailed data we have on the condition of the construction site,the more precisely the masses can be calculated and the expenditure for a construction project determined. These little digital helpers make this possible and at the same time save us a lot of time, ”says Holger Kaiser, Manager for BIM and Digitization at BAUER Resources GmbH.

After the surveying work, the three construction pits were gradually excavated to a depth of 3.5 m, with a total of 9,100 m3 of material being excavated and disposed of, including around 16,000 t of contaminated soil and rubble as well as around 500 t of pasty tar. Found foundations were recorded three-dimensionally with a tablet including the measurement software and passed on to the BIM department of Bauer Resources to calculate the volumes. After the largest of the three excavation pits (approx. 4,200 m³ of excavation), replacement bores with a diameter of 1,800 mm down to a depth of 7 m below the top of the terrain were carried out to remove the tar hotspot. The resulting soil was brought to the soil processing center of the Bauer Umwelt division in Bleicherode, 150 km away, for recycling.The contaminated dripping water from the drilling process was cleaned off with the groundwater cleaning system. The completion of the work is the creation of the last excavation pit with subsequent earthworks.

In summary, it is an all-round classic renovation project, which nevertheless has the character of a beacon in terms of digital implementation. In addition to drones, rover rods and tablets, the Bauer team also used a digital tool for construction site documentation: instead of pen, paper and a camera, Friedrich Leifheit, construction manager in the Bauer Environment division, and his team recorded all the relevant data, i.e. H. Work carried out, deployed personnel and equipment, construction site pictures and quality information in the digital construction diary - a practical web application - on the tablet. The decisive advantage: All construction site diaries for a construction site are automatically collected and summarized. The tedious and time-consuming creation of the report in the office is no longer necessary. "This allows us to see the construction progress at a glance,can check the services provided and take countermeasures in the event of deviations and adjust the plan, "explains Friedrich Leifheit, adding:" In addition, the information is available to everyone involved around the clock and regardless of location. That simplifies and improves communication on the construction site enormously. ”The work on the part of Bauer is expected to be completed in September 2021.

About the BAUER Resources Group

The regionally organized BAUER Resources GmbH, with its subsidiaries in Germany, Africa, the Middle East and South America, is geared towards projects all over the world and has extensive expertise in the fields of drilling services and well construction, environmental technology, plant treatment systems, mining and renovation. With more than 30 years of experience, the Bauer Umwelt division of BAUER Resources GmbH is one of the leading remediation companies as well as soil treatment and disposal companies in Germany and abroad. As an expert in reducing environmental pollution, Bauer Umwelt offers a wide range of services in all matters relating to environmental issues.Other companies in the BAUER Resources Group are the GERMAN WATER and ENERGY GROUP (GWE) - manufacturer of trend-setting products and developer of integrated applications for well construction and geothermal energy - and the Site Group for Services and Well Drilling Ltd. in Jordan. More at

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